NDLI: Grassland composition, structure, and diversity patterns along major environmental gradients in the Central Tien Shan

Content Provider	Springer Nature Link
Author	Taft, John B. Phillippe, Loy R. Dietrich, Chris H. Robertson, Kenneth R.
Copyright Year	2011
Abstract	What species and traits signal vegetation types along prominent environmental gradients in the Central Tien Shan and what are the corresponding diversity patterns? Vegetation was sampled at 41 sites throughout the Kyrgyz Republic using quadrats stratified throughout a 1,000-m$^{2}$ sample area. Relationships among major environmental gradients, vegetation structure, and species composition were explored with nonmetric multidimensional scaling. Species distributions were examined to characterize phytogeographic patterns. Seven vegetation types ranging from desert grassland to meadow steppe were identified with cluster analysis, ordered primarily along elevation/mean annual temperature gradients. Four arid grassland types were distinguished, ranging mainly from 900 to 1,700 m elevation, and characterized by co-dominance of grasses and forbs with secondary dominance by shrubs. Annual and biennial forbs equaled perennial forbs in total importance. Grasses include C3 and C4 species. Three montane grassland types were recognized and characterized by co-dominance of perennial C3 grasses and forbs. Transition to montane steppe occurred from 1,500 to 1,900 m and is correlated with absence of C4 grasses and dominance of Festuca valesiaca. Highest diversity was found at intermediate elevations, from 1,800 to 2,600 m, in meadow steppe habitats. Forty-six percent of 580 identified species are Middle Asian endemics and remaining species primarily have distributions including Eastern Europe, the Caucasus, and western Siberia. Although grassland degradation from overgrazing has been chronic throughout the region, grasslands are widespread throughout the Kyrgyz Republic and many, particularly mid-elevation meadow steppes, retain high levels of native species diversity.
Starting Page	1349
Ending Page	1361
Page Count	13
File Format	PDF
ISSN	13850237
Journal	Plant Ecology
Volume Number	212
Issue Number	8
e-ISSN	15735052
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-03-19
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Grazing Functional groups Kyrgyz Republic Middle Asia Nonmetric multidimensional scaling Species density Steppe Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Plant Science

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Texture) of talas ala-tau (tien shan, kyrgyz republic): (2002).

Grazing effects on species diversity across different scales are related to grassland types

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MESO-CENOzOiC TECTONiCS Of THE CENTRal KyRgyz TiEN SHaN (CENTRal aSia), baSEd ON apaTiTE fiSSiON TRaCK THERMOCHRONOlOgy

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Grassland composition, structure, and diversity patterns along major environmental gradients in the Central Tien Shan

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